208 



Annelida Clmtopoda 



little triangular folds, which in contracted specimens en- 

 croach ou the posterior margin of the head. This is also 

 the case with L. variabilis. 



Length 10 to 20°^""; diameter 2 to i"""" — some of the 

 widest specimens not being more than 15"°" in length, while 

 some of the longest are not over 3°"° in width. Number 

 of segments (setigerous), 25. 



ANTINOE Knbg. 

 AnTINOE parasitica 71. sp. 



PL. II, FIGS. 15-22. 



A minute form, found under the elytra of Lepidameiria 

 commensalis. I have never seen a perfect specimen. Of 

 the three found, two were without elytra ; the third had 

 a few remaining. Number of setigerous segments, 21. 



Head (pi. II, fig. 15), divided into lobes in front by a 

 deep triangular depression which is continued backward 

 to the posterior margin, as a narrow, but well defined 

 impressed line. The widest [)ait of the head is about the 

 middle third, where it is convex at the sides; but the 

 lateral margins both in front and back of this part are 

 slightly concave; dorsal surface convex. 



Anterior eyes, situated on the middle line, widely sepa- 

 rated, black, crescentic : posterior eyes small, circular, 

 about half-way between the front pair and the posterior 

 margin of the head. Middle antenna lost, except basal 

 article : this last occupies in part the space between the 

 lobes of the head, is large, but not very long. The lateral 

 antennae are without basal articles; they arise beneath the 

 anterior margin of the head, and are smooth, conical, 

 slightly compressed at base : their length is about half that 

 of the head. Palpi, nearly twice the length of the head, 

 smooth, cylindrical for their inner three-fourths, then sud- 

 denly decreasing in diameter. 



